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Time division duplex dynamic frame structure configuration method, determination method and corresponding device

A technology of time division duplex and structure configuration, which is applied in the field of communication and can solve the problem of inability to obtain the actual transmission frame structure.

Inactive Publication Date: 2014-04-09
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] 2. Robustness of dynamic DCI: Another problem with dynamic DCI is robustness. If the UE cannot correctly demodulate the PDCCH, it cannot obtain the actual transmission frame structure

Method used

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  • Time division duplex dynamic frame structure configuration method, determination method and corresponding device
  • Time division duplex dynamic frame structure configuration method, determination method and corresponding device
  • Time division duplex dynamic frame structure configuration method, determination method and corresponding device

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Experimental program
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Embodiment 1

[0125] This embodiment introduces a TDD dynamic frame structure configuration method. The method in this embodiment is mainly aimed at the base station side, such as figure 1 shown, including the following steps:

[0126] Step 101, select a frame structure, and determine the subframe that will arrive at the user equipment the earliest among a group of downlink subframes corresponding to the same uplink feedback in the frame structure, and the uplink feedback is used to indicate the corresponding downlink subframe group data Received correctly or not;

[0127] A set of downlink subframes described in this paper is a downlink subframe group, and the downlink subframe group is: according to the timing relationship between the downlink physical shared channel (PDSCH) and uplink feedback (ACK or NACK) defined in the existing definition (3GPP Release 8), it is mapped to One or more downlink subframes for one uplink feedback.

[0128] In a preferred embodiment, the method of select...

Embodiment 2

[0183] This embodiment introduces a method for determining a TDD dynamic frame structure. The method in this embodiment is mainly aimed at the UE side, such as image 3 shown, including the following steps:

[0184] Step 301, select a frame structure, and determine the subframe that will arrive at the user equipment the earliest among a group of downlink subframes corresponding to the same uplink feedback in the frame structure, and the uplink feedback is used to indicate the corresponding downlink subframe group data Received correctly or not;

[0185] For the method for selecting the frame structure on the UE side and the method for selecting subframes in the frame structure, refer to the method on the base station side in Embodiment 1, wherein:

[0186] After the frame structure is determined by method 1, if there are multiple DCIs in subframes that satisfy condition 1 (that is, the frame structure has multiple uplink subframes that can send uplink feedback), then obtain t...

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Abstract

The invention discloses a time division duplex dynamic frame structure configuration method, a time division duplex dynamic frame structure determination method and a corresponding device. With the time division duplex dynamic frame structure configuration method, determination method and the corresponding device adopted, robustness can be improved, and no restriction is imposed on scheduling. The time division duplex dynamic frame structure configuration method including the following steps that: a frame structure is selected, and sub frames in one group of downlink sub frames of the frame structure, which arrives at use equipment at first, are determined, wherein this group of downlink sub frames is corresponding to the same uplink feedback, and the uplink feedback is used for indicating whether data receiving of corresponding downlink sub frame groups is correct or not; and downlink allocation index (DAI) values in downlink control information (DCI) in the sub frames are set, wherein the downlink allocation index (DAI) values are used for performing dynamic frame structure indication. A dynamic frame structure configuration device includes a frame structure determination module, a sub frame determination module and a configuration module. According to the time division duplex dynamic frame structure configuration method provided by the invention, downlink allocation index (DAI) bits in the downlink control information (DCI) of specific sub frames are utilized to dynamically configure the frame structure, and therefore, no restriction will be imposed on the scheduling, and the robustness of a system can be improved.

Description

technical field [0001] The present invention relates to the communication field, in particular to a time division duplex (Time Division Duplex, TDD for short) dynamic frame structure configuration method, determination method and corresponding device. Background technique [0002] In LTE (Long Term Evolution, long-term evolution) and LTE-A (LTE-advance, LTE evolution) standards, a TDD system frame is composed of ten subframes. 3GPP supports a total of 7 frame structures, as shown in Table 1. Among them, D indicates that the subframe is used for downlink transmission, U indicates that the subframe is used for uplink transmission, S indicates a special subframe and contains three special time slots, that is, the downlink guide Downlink Pilot Time Slot (DwPTS for short, used for downlink transmission), Guard Period (GP for short), and Uplink Pilot Time Slot (Uplink Pilot Time Slot, UpPTS for short, used for uplink transmission). [0003] Table 1: TDD system uplink and downlink...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L5/00H04L1/00
Inventor 张晓博
Owner ZTE CORP